Radio spectra of the WMAP catalog sources
Sergei A. Trushkin (SAO RAS)

TL;DR
This paper presents compiled radio spectra for 208 extragalactic sources from the WMAP catalog, including flux measurements across multiple frequencies and long-term variability analysis, providing a comprehensive spectral database.
Contribution
It offers the first extensive compilation of radio spectra for WMAP sources, integrating data from various catalogs and observations, and analyzing their spectral characteristics and variability.
Findings
Most WMAP sources are reliably identified with known radio sources.
The spectra generally maintain their shape over time despite variability.
A large dataset of over 206,000 flux measurements was assembled.
Abstract
Compiled radio spectra are presented for 208 extragalactic sources from the catalog created from the WMAP satellite all-sky survey data in a range of 23-94 GHz taken during the first year of its operation in orbit. 205 out of 208 WMAP sources are reliably identified with radio sources from other catalogs, including also four out of five sources unidentified by the WMAP survey authors. We have found 203 WMAP sources to have optical identification: 141 quasars, 29 galaxies, 19 active galactic nuclei, 19 BL Lac-type objects and one planetary nebula, IC418. Simultaneous measurements of flux densities for 26 sources at five frequencies, 2.3, 3.9, 7.7, 11.2 and 21.7 GHz, were made with the radio telescope RATAN-600 in 2003 March. 25 sources were detected at all the frequencies, and only one, WMAP0517-0546, unidentified in other catalogs was not detected in our observations and is likely to be…
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Taxonomy
TopicsRadio Astronomy Observations and Technology · Astrophysics and Cosmic Phenomena · Geophysics and Gravity Measurements
